1. Among the more important references are Hodgkin, D. C., Cold Spring Harbor Symp., 14, 65 (1950). Low, B., in “The Proteins”, 1, 235 (Academic Press, New York, 1953). Schramm, G., Z. Naturforsch., 2 b, 112, 249 (1947).
2. Williams, R. C., Cold Spring Harbor Symp., 18, 185 (1953); “Advances in Virus Research”, 2, 184 (Academic Press, New York, 1954).
3. Bernal, J. D. and Fankuchen, I., J. Gen. Physiol., 25, 111, 147 (1941).
4. Markham, R., Disc. Farad. Soc., 11, 221 (1951). See also Bernal, J. D., and Carlisle, C. H., Disc. Farad. Soc., 11, 227 (1951), and Schmidt, P., Kaesberg, P., and Beeman, W. W., Biochim. et Biophys. Acta, 14, 1 (1954).
5. Schramm, G., Schumacher, G., and Zillig, W., Nature, 175, 549 (1955).